2198784 has 72 divisors (see below), whose sum is σ = 6704320. Its totient is φ = 626688.

The previous prime is 2198783. The next prime is 2198827. The reversal of 2198784 is 4878912.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5172 + ... + 5580.

2^2198784 is an apocalyptic number.

2198784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2198784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3352160).

2198784 is an abundant number, since it is smaller than the sum of its proper divisors (4505536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2198784 is an equidigital number, since it uses as much as digits as its factorization.

2198784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 421 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 2198784 is about 1482.8297272445. The cubic root of 2198784 is about 130.0351778568.

The spelling of 2198784 in words is "two million, one hundred ninety-eight thousand, seven hundred eighty-four".